I'm running a server through server.pro right now, and we recently changed maps. This was fairly recent, so a few bugs are expected while we get everything back in working order, but for some reason, unopped players cannot open chests or use crafting tables, brewing stations etc. etc. in a certain region.
I found how large the region was and tried to create a worldguard region from it, and I added the flag to use chests and etc. items, but they still aren't working. I also made sure they had essentials.build.interact.* but still, nothing.
I'm running on 1.10, and it's important they be able to use these things. I have a full server run-down below: